Grinding-mill



(No Model.)

- J. o. DELL.

GRINDING MILL.

No. 305,@5. P tented Se]1; I 23, 1884.

MM l

Nrrno Sra'riis JOI-IN C. DELL, OFIHILADELPHIA, PENNSYLVANIA.

GRINDING-NIILL.

SPECIFICATION forming part of Letters Patent No. 305,435, dated September 23, 1884:.

Application lcd March 29, 1884. (Nomodel.)

To all whom t may con/cern,.-

Be it knownthat I, JOHN C. DELL, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Grinding-Mills,wl1ich improvement is fully set `forth in the following specification and accompanying drawings, in which-f Figure 1 is a partial side elevation and partial vertical section in line @a as, Fig. 2, of a portion of a grinding-mill embodying my invention. Fig. 2 is a vertical section inline y y, Fig, 3. Fig. 3 is a side elevation of the main portions, `corresponding to Fig. 1.

Similar letters of reference indicate corresponding parts in the several gures. p

This invention relates to grinding -mills which employ a grinding-cone and a shell adjustable with respect thereto; and said invention consists `in certain devices for effecting such adjustment and allowing said shell to be rotated to free the feed-spout from foreign matter, as hereinafter described, and pointed out in the claims.

Referring to the drawings, A represents part of the stand or frame of the mill, and B the driving-shaft, C the cone, D the shell, and E the inlet-spout thereof, the cone being'iixed to the shaft B so as to rotate therewith, and the shell loosely mounted on said shaft, so as to be capable of being rotated, and thus overturn the spout, as shown by dotted lines, Fig. 2,whereby, should nails, stones, &c., have entered theshell with the coffee, spice, Ste., to be ground, such injurious obstacles may be readily removed or will fall out, or the shell and cone clear themselves thereof, as set forth in the Letters Patent No. 210,676, granted to me on the 10th day of December, 1878.

In order to hold the shell in operative position during the grinding operationthat is, with the spout E upright and sustaining the hopper or urnthere is connected with the side of the shell a forked or slotted lug, F, with Vwhich engages a bolt, G, whose lower end is mounted on a block, H, supported on the frame A. The upper end of the bolt G is screw-threaded for the engagement of a nut,V

during the operation of the mill. Vhenit is desired to overturn the spout, the `hopper or urn is removed, the nut J loosened, and the bolt G thrown out from the lug F, whereby the latter is released and the shell may be rotated and the spout moved around therewith.

In order to adj ust the shell relativelyrto the cone, whereby the mill may grind line or coarse, and provision be made for the wear of the `shell and cone, I employ a screw, K, which is journaled in ears L, which are supported on the frame A, the screw engaging with the block H, to which the shell is secured. It will be seen that by rotating the screw the block will be moved laterally relatively to the direction of rotation of said screw, and thus l theshell follows the motions of the block, and

1. In a grinding-mill, a shell, iul combina;

tion with a shaft on which it is mounted, a feed-spout attached to said shell, a grindingcone carried by said shaft within said shell, and clamping devices which hold said shell stationary, the release of said shell therefrom allowing it to be turned for the purpose of inverting and clearing said spout, substantially as set forth.

2. In a grinding-mill, a shell rotatably mounted on the drivingshaft and provided with a slotted lug on its side, a pivoted bolt connectedV with the frame, and a nut, said bolt entering the slot of the lug, and said nut tightening the lug in position, the parts being combined and operating substantially as andl for thepurpose set forth.

3. In a grinding-mill, the combination-of a relativelystationary cone and a driving-shaft carrying the same, with a shell movable longitudinally over said shaft and cone, the forked lug F on said shell, the swinging bolt G, the

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block H, which is ,laterally movable in the gages With said screw and clamps said lug to frame, the ears L, and screw K, said screw besaid block, these latter devices thus serving ing journaled in the ears and engaging with both as connections which allow the adjustthe laterally-movable block, substantially as ment of the shell With respect to the cone and I 5 5 set forth. as means for allowing the rotation of the shell 4. In a grinding-mill, the combination of to free the feed-spoutfrom foreign matter, subthe oone, the shaft, the shell mounted on the stantially as set forth. shaft and provided with a feedspout, the

, JOHN C. DELL. block, adjusting-screw K, the slotted lug F, Witnesses:

' Y 1o screw G, projecting from said block through I JOHN A. WIEDERSHEIM,

the slot in said lug, and the nut J, which en- A. P. GRANT. 

